Goodwill and Other Intangible Assets - Narrative (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year	$ 43,300
Finite-Lived Intangible Assets, Amortization Expense, Year One	55,200
Finite-Lived Intangible Assets, Amortization Expense, Year Two	49,800
Finite-Lived Intangible Assets, Amortization Expense, Year Three	44,700
Finite-Lived Intangible Assets, Amortization Expense, Year Four	42,900
Finite-Lived Intangible Assets, Amortization Expense, Year Five	40,000
Finite-Lived Intangible Assets, Amortization Expense, after Year Five	386,000
Goodwill	1,275,327	$ 1,271,855
Local Media
Goodwill	$ 930,433	926,945
Goodwill, Percentage Of Consolidated Goodwill Total	73.00%
Indefinite-lived intangible assets - FCC licenses
Intangible Asset, Sensitivity Analysis of Fair Value, Impact Of 50 Basis Point Increase In Discount Rate		$ 65,000
Other Reporting Units
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount		30.00%
Local Media
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount		25.00%